Bash regex match substring

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Oct 21, 2010 · aabbcc =~ aabb.* matches -- the 'aabb' sections match exactly, then the .* matches the 'cc' section aabbcc =~ aabb does not match -- the 'aabb' sections match but there is nothing in the regexp to match the 'cc' portion on the left aabbcc =~ bbcc does not match -- the 'bbcc' sections match, but there is nothing in the regexp to match the 'aa ...
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Top Forums Shell Programming and Scripting Using BASH =~ regex to match multiple strings. I have a scripting problem that I'm trying to solve, whereby I want to match that a string contains either of three strings. I'm thinking this is probably just me not understanding how to craft the appropriate regex.
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#!/bin/bash # substring-extraction.sh String=23skidoo1 # 012345678 Bash # 123456789 awk # Note different string indexing system: # Bash numbers first character of string as '0'. # Awk numbers first character of string as '1'.
The result is a regular expression that will match a string if a matches its first part and b matches the rest. For example, `xy' (two match-self operators) matches `xy'. Repetition Operators. Repetition operators repeat the preceding regular expression a specified number of times. The Match-zero-or-more Operator (*) Returns the substring that matches a regular expression within a string. If no match is found, returns NULL. See also String Functions (Regular Expressions). String of one or more characters that specifies the regular expression parameters used to search for matches. The supported values areRegular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects. These patterns are used with the exec() and test() methods of RegExp, and with the match(), matchAll(), replace(), replaceAll(), search(), and split() methods of String.
REGEXP_SUBSTR extends the functionality of the SUBSTR function by letting you search a string for a regular expression pattern. It is also similar to REGEXP_INSTR, but instead of returning the position of the substring, it returns the substring itself. This function is useful if you need the contents of a...
Bash Split String Split String with single character delimiter(s) in Bash using IFS. To split a string in bash using IFS, follow the below steps: Set IFS to the delimiter you would want. IFS='<delimiter>' IFS is an internal variable that determines how Bash recognizes word boundaries. The default value of IFS is white space.
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